4200400123420 has 24 divisors (see below), whose sum is σ = 9059241348864. Its totient is φ = 1634750318016.

The previous prime is 4200400123397. The next prime is 4200400123481. The reversal of 4200400123420 is 243210040024.

It is a happy number.

It is a super-2 number, since 2×4200400123420² (a number of 26 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 4200400123391 and 4200400123400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2838107452 + ... + 2838108931.

It is an arithmetic number, because the mean of its divisors is an integer number (377468389536).

Almost surely, 2^{4200400123420} is an apocalyptic number.

It is an amenable number.

4200400123420 is an abundant number, since it is smaller than the sum of its proper divisors (4858841225444).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4200400123420 is a wasteful number, since it uses less digits than its factorization.

4200400123420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5676216429 (or 5676216427 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

Adding to 4200400123420 its reverse (243210040024), we get a palindrome (4443610163444).

The spelling of 4200400123420 in words is "four trillion, two hundred billion, four hundred million, one hundred twenty-three thousand, four hundred twenty".